Yea in retrospect this is easy to say and it is trivial to join the dots, but the real leg work was done by John Carreyrou. He single-handedly investigated, recognized the fraud and exposed Theranos when everyone was writing rosy stories about Elizabeth Holmes: https://en.wikipedia.org/wiki/John_Carreyrou
> He won the Pulitzer Prize twice and is well known for having exposed the fraudulent practices of the multibillion-dollar blood-testing company Theranos in a series of articles published in The Wall Street Journal.
> He won the Pulitzer Prize twice and is well known for having exposed the fraudulent practices of the multibillion-dollar blood-testing company Theranos in a series of articles published in The Wall Street Journal.
Highly recommend reading his book that gives a detailed account on how he went about taking on Theranos: https://www.goodreads.com/book/show/37976541-bad-blood